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    • 1. 发明申请
    • Nitrided mo alloy worked material having high corrosion resistance, high strength and high toughness and method for production thereof
    • 具有高耐腐蚀性,高强度和高韧性的氮化钼合金加工材料及其制造方法
    • US20060054247A1
    • 2006-03-16
    • US10509156
    • 2003-03-27
    • Jun TakadaMasahiro NagaeMakoto NakanishiTomohiro Takida
    • Jun TakadaMasahiro NagaeMakoto NakanishiTomohiro Takida
    • C23C8/24
    • C22C27/04C23C8/02C23C8/24C23C26/00
    • The present invention provides an innovative material which has properties which cannot be achieved with conventional materials, i.e., having satisfactory high corrosion resistance and high strength in very severe corrosive conditions, for example, a 75% sulfuric acid (H2SO4) aqueous solution (180° C.) in addition to high strength at high temperatures and high toughness at low temperatures, and provides a method for effectively manufacturing the innovative material. A worked molybdenum-alloy material, subjected to nitriding, which has high corrosion resistance, high strength, and high toughness, includes fine nitride particles formed by subjecting a nitride-forming-metal element dissolved to form a solid solution in an untreated worked molybdenum-alloy material to internal nitriding, the fine nitride particles being dispersed inside the worked molybdenum-alloy material subjected to nitriding; and a molybdenum nitride layer formed by subjecting a worked structure or a recovered structure at the surface of the untreated worked molybdenum-alloy material to external nitriding, the molybdenum nitride layer being provided at the surface of the worked molybdenum-alloy material subjected to nitriding. A method for manufacturing a worked molybdenum-alloy material subjected to nitriding includes the steps of subjecting an untreated worked alloy material in which at least any one of titanium, zirconium, hafnium, vanadium, niobium, and tantalum is dissolved to form a solid solution to multi-step internal nitriding treatment including a stepwise increase of the treatment temperature, and then subjecting the worked alloy material to external nitriding treatment.
    • 本发明提供了一种创新材料,其具有用常规材料不能实现的性质,即在非常严重的腐蚀条件下具有令人满意的高耐腐蚀性和高强度,例如75%的硫酸(H 2) 除了在高温下的高强度和低温下的高韧性之外,还提供了一种有效地制造创新材料的方法。 具有高耐腐蚀性,高强度和高韧性的经过氮化处理的钼合金材料包括通过将溶解形成固溶体的氮化物形成金属元素在未处理的加工的钼 - 合金材料进行内部氮化,氮化物微粒分散在经受氮化的加工的钼合金材料内; 以及通过在未经处理的加工的钼合金材料的表面处理加工结构或回收结构进行外部氮化而形成的氮化钼层,所述氮化钼层设置在经受氮化的加工的钼合金材料的表面。 制造经过氮化处理的钼合金材料的方法包括以下步骤:使其中溶解有钛,锆,铪,钒,铌和钽中的至少一种的未处理的加工合金材料形成固溶体 包括逐步增加处理温度的多步内部氮化处理,然后对加工的合金材料进行外部氮化处理。
    • 4. 发明授权
    • High melting point metal based alloy material having high toughness and strength
    • 具有高韧性和强度的高熔点金属基合金材料
    • US06589368B1
    • 2003-07-08
    • US09926591
    • 2001-11-21
    • Jun TakadaMasahiro NagaeYutaka HiraokaYoshito Takemoto
    • Jun TakadaMasahiro NagaeYutaka HiraokaYoshito Takemoto
    • C22C2704
    • C22C27/04C23C8/24
    • The present invention provides a refractory-metal-based alloy material having a remarkably enhanced toughness and strength, by internally nitriding a nitride-forming metal element incorporated as a solid solution into an alloy worked piece, which has a parent phase consisting of one element selecting from Mo, W and Cr, at a temperature equal to or lower than a recrystallization upper limit temperature of the worked piece to dispersedly yield ultra-fine nitride particles to the worked piece and thereby raise a recrystallization lower limit temperature of the worked piece, and then subjecting the internally nitrided worked piece to a second nitriding treatment at a temperature equal to or more than the raised recrystallization lower limit temperature, wherein at least in the surface region of the worked piece has a structure in which ultra-fine nitride precipitated particles are grown and stabilized with keeping the worked structure of the worked piece.
    • 本发明提供了一种耐熔金属基合金材料,其具有显着提高的韧性和强度,通过将合并作为固溶体的氮化物形成金属元素内部渗氮到合金工件中,所述合金工件具有由一个元件选择 在等于或低于加工件的再结晶上限温度的温度下分散地向加工件产生超细氮化物颗粒,从而提高加工件的再结晶下限温度,以及 然后在等于或大于升高的再结晶下限温度的温度下对内部氮化处理件进行第二氮化处理,其中至少在加工件的表面区域中具有超细氮化物沉淀颗粒的结构 保持工件的加工结构,生长稳定。